Sure thing! We've got 331 and we're gonna multiply it by 51. That's the same as adding 331 to itself 51 times.
Step 1: 0 + 331 = 331
Step 2: 331 + 331 = 662
Step 3: 662 + 331 = 993
Step 4: 993 + 331 = 1324
Step 5: 1324 + 331 = 1655
Step 6: 1655 + 331 = 1986
Step 7: 1986 + 331 = 2317
Step 8: 2317 + 331 = 2648
Step 9: 2648 + 331 = 2979
Step 10: 2979 + 331 = 3310
Step 11: 3310 + 331 = 3641
Step 12: 3641 + 331 = 3972
Step 13: 3972 + 331 = 4303
Step 14: 4303 + 331 = 4634
Step 15: 4634 + 331 = 4965
Step 16: 4965 + 331 = 5296
Step 17: 5296 + 331 = 5627
Step 18: 5627 + 331 = 5958
Step 19: 5958 + 331 = 6289
Step 20: 6289 + 331 = 6620
Step 21: 6620 + 331 = 6951
Step 22: 6951 + 331 = 7282
Step 23: 7282 + 331 = 7613
Step 24: 7613 + 331 = 7944
Step 25: 7944 + 331 = 8275
Step 26: 8275 + 331 = 8606
Step 27: 8606 + 331 = 8937
Step 28: 8937 + 331 = 9268
Step 29: 9268 + 331 = 9599
Step 30: 9599 + 331 = 9930
Step 31: 9930 + 331 = 10261
Step 32: 10261 + 331 = 10592
Step 33: 10592 + 331 = 10923
Step 34: 10923 + 331 = 11254
Step 35: 11254 + 331 = 11585
Step 36: 11585 + 331 = 11916
Step 37: 11916 + 331 = 12247
Step 38: 12247 + 331 = 12578
Step 39: 12578 + 331 = 12909
Step 40: 12909 + 331 = 13240
Step 41: 13240 + 331 = 13571
Step 42: 13571 + 331 = 13902
Step 43: 13902 + 331 = 14233
Step 44: 14233 + 331 = 14564
Step 45: 14564 + 331 = 14895
Step 46: 14895 + 331 = 15226
Step 47: 15226 + 331 = 15557
Step 48: 15557 + 331 = 15888
Step 49: 15888 + 331 = 16219
Step 50: 16219 + 331 = 16550
Step 51: 16550 + 331 = 16881

So, 331*51 = 16881